As stated on MacFixIt, this update seems to cause a problem saving larger files (I tried 32MB) from photoshop to PNG format. Photoshop had no problem doing it before the update (after installing 10.5.2), but completely locked, when attempting it after this update.
Photoshop does not seem to have a problem with PSD, TIFF, or JPEG at this point, but I haven't tested all the Save As... options.
Apple Leopard Graphics
for OS X 10.5.2
Version: 1.0